ErrorCodeDoctor
LG · Air Conditioner

LG Air Conditioner CH61 error code

Difficulty: Medium · Cost: $0–$100 · Duration: 15–30m

The CH61 error means your LG air conditioner has shut down due to overheating. In cooling mode the outdoor unit has reached a dangerously high temperature, usually because hot air cannot escape from the area around the unit. In heating mode the indoor unit has overheated, most often because a dirty or clogged filter is blocking airflow. This error is a safety protection and will not clear on its own — a manual power cycle is required after fixing the underlying cause. The code may also appear as P4, P6, P7, P8, or CH34 depending on the model.

Common causes

  • Outdoor unit installed in a poorly ventilated enclosed balcony trapping hot air
  • Ventilation window or insect screen around the outdoor unit is closed
  • Clutter or objects piled around the outdoor unit blocking airflow
  • Outdoor unit positioned too low relative to the ventilation window
  • Indoor unit air filter is dirty or clogged restricting airflow during heating mode

How to fix it

  1. 1

    If in cooling mode check the outdoor unit — open any ventilation windows or insect screens nearby

  2. 2

    Clear any objects or clutter around the outdoor unit to allow hot air to escape freely

  3. 3

    If the outdoor unit is on an enclosed balcony consider installing an air guide to direct hot air outside

  4. 4

    If the outdoor unit sits below the ventilation window raise it with a stand so it aligns with the opening

  5. 5

    If in heating mode remove and clean the indoor unit air filter

  6. 6

    Once the ventilation or filter issue is resolved unplug the power cord or turn off the circuit breaker and wait 5 minutes

  7. 7

    Restore power to clear the error and restart the unit

  8. 8

    If CH61 keeps returning after fixing the ventilation and filter contact a technician for inspection

Related LG Air Conditioner error codes

1

CH04

The indoor unit is not draining condensate water properly

easy
2

CH05

Communication between the indoor and outdoor units has been lost

medium
3

CH07

Two connected units are set to conflicting operating modes

easy
4

CH38

The air conditioner is low on refrigerant gas

hard

CH61 error — frequently asked questions

What does the CH61 error mean on a LG air conditioner?

The outdoor unit overheated during cooling or the indoor unit overheated during heating

What causes the CH61 error?

The CH61 error is usually caused by: Outdoor unit installed in a poorly ventilated enclosed balcony trapping hot air; Ventilation window or insect screen around the outdoor unit is closed; Clutter or objects piled around the outdoor unit blocking airflow; Outdoor unit positioned too low relative to the ventilation window; Indoor unit air filter is dirty or clogged restricting airflow during heating mode.

Can I fix the CH61 error myself?

It's possible for a moderately handy person, but budget 15–30m and expect some disassembly.

How much does it cost to fix the CH61 error?

Fixing the CH61 error on a LG air conditioner typically costs $0–$100, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my air conditioner with the CH61 error?

In most cases yes, but it's best to address the CH61 error soon — see the fix steps below to resolve it.